The ThinkPad T430 is quite repairable in that regard. I've replaced the screen in 20 minutes, replaced the CPU, all the SSD-s are easily accessible, and there's plenty of spare parts out there due to the fact that it's a model that was once popular and bought in bulk by many businesses.
But yes, some models probably don't have the same level of second-hand parts market, making repair difficult.
But yes, some models probably don't have the same level of second-hand parts market, making repair difficult.